<?php

declare(strict_types=1);

namespace Opencart\Catalog\Controller\Extension\PayAnyWay\Payment;

use Opencart\Catalog\Model\Account\Customer as ModelAccountCustomer;
use Opencart\Catalog\Model\Account\Order as ModelAccountOrder;
use Opencart\Catalog\Model\Checkout\Order as ModelCheckoutOrder;
use Opencart\System\Engine\Config;
use Opencart\System\Engine\Loader;
use Opencart\System\Library\Cart\Customer;
use Opencart\System\Library\Document;
use Opencart\System\Library\Language;
use Opencart\System\Library\Request;
use Opencart\System\Library\Response;
use Opencart\System\Library\Session;
use Opencart\System\Library\Url;

require_once DIR_EXTENSION . '/payanyway/catalog/library/payanyway/traits/payanyway.php';

/**
 * @property Config $config
 * @property Loader $load
 * @property Request $request
 * @property Response $response
 * @property Document $document
 * @property Session $session
 * @property Language $language
 * @property Url $url
 * @property ModelCheckoutOrder $model_checkout_order
 * @property ModelAccountOrder $model_account_order
 * @property ModelAccountCustomer $model_account_customer
 * @property Customer $customer
 * @property \Opencart\Catalog\Model\Extension\PayAnyWay\Payment\PayAnyWay $model_extension_payanyway_payment_payanyway
 */

class PayAnyWay extends \Opencart\System\Engine\Controller
{
	use \Opencart\Catalog\Library\Extension\PayAnyWay\Traits\PayAnyWay;

	private const PAYMENT_SERVER_PROD = 'prod';
	private const PAYMENT_URL_PROD = 'https://www.payanyway.ru/assistant.htm';
	private const PAYMENT_URL_DEMO = 'https://demo.moneta.ru/assistant.htm';

	public const DESCRIPTION_MAX_LENGTH = 500;

	public function __construct(\Opencart\System\Engine\Registry $registry)
	{
		parent::__construct($registry);

		$this->initializeModule();
		$this->loadOrder($this->getOrderIdFromSession());
	}

	/**
	 * @throws \Exception
	 */
	public function index(): string
	{
		if (([] === $this->orderInfo)
			|| !$this->isPaidWithModule()
			|| !$this->isAwaitingPayment((int)($this->orderInfo['order_status_id'] ?? 0))
		) {
			return '';
		}

		$this->load->language('extension/payanyway/payment/payanyway');
		$this->document->setTitle($this->language->get('heading_title'));

		$data['action'] = (self::PAYMENT_SERVER_PROD === $this->server)
			? self::PAYMENT_URL_PROD
			: self::PAYMENT_URL_DEMO;

		$data['MNT_ID'] = $this->mntId;
		$data['MNT_AMOUNT'] = $this->getOrderAmount();
		$data['MNT_TRANSACTION_ID'] = $this->createTransactionId($this->orderId, $data['MNT_AMOUNT']);
		$data['MNT_CURRENCY_CODE'] = $this->currency;
		$data['MNT_TEST_MODE'] = $this->testMode ? '1' : '0';
		$data['MNT_DESCRIPTION'] = $this->getDescription();
		$data['MNT_SUBSCRIBER_ID'] = $this->getSubscriberId();

		$data['MNT_SIGNATURE'] = $this->buildFormSignature($data);
		$urlArgs = $this->getUrlArgs($this->session->data['customer_token'] ?? null);
		$data['MNT_SUCCESS_URL'] = $this->url->link('extension/payanyway/payment/payanyway.success', $urlArgs, true);
		$data['MNT_FAIL_URL'] = $this->url->link('extension/payanyway/payment/payanyway.fail', $urlArgs, true);
		$data['MNT_RETURN_URL'] = $this->url->link('checkout/checkout', $urlArgs, true);
		$data['moneta_locale'] = $this->language->get('text_locale');
		$data['MNT_CMS'] = $this->getCms();

		$data['btn_confirm'] = $this->language->get('text_paw_pay');

		$data['confirm_url'] = $this->url->link('extension/payanyway/payment/payanyway.confirm', $urlArgs, true);

		return $this->load->view('extension/payanyway/payment/payanyway', $data);
	}

	/**
	 * @param array<string, mixed> $data
	 */
	private function buildFormSignature(array $data): string
	{
		return md5(
			$data['MNT_ID'] .
			$data['MNT_TRANSACTION_ID'] .
			$data['MNT_AMOUNT'] .
			$data['MNT_CURRENCY_CODE'] .
			$data['MNT_SUBSCRIBER_ID'] .
			$data['MNT_TEST_MODE'] .
			$this->integrityCode,
		);
	}

	public function confirm(): void
	{
		$this->load->language('extension/payanyway/payment/payanyway');

		$json['success'] = $this->changeStatusUnderOrderLock(true, $this->pendingOrderStatusId, $this->language->get('text_order_confirmed'));

		$this->response->addHeader('Content-Type: application/json');
		$this->response->setOutput(json_encode($json));
	}

	public function success(): void
	{
		$this->load->language('extension/payanyway/payment/payanyway');

		$this->changeStatusUnderOrderLock(false, $this->pendingOrderStatusId, $this->language->get('text_payment_processing'));

		$this->response->redirect($this->url->link('checkout/success', $this->getUrlArgs($this->request->get['customer_token'] ?? null), true));
	}

	public function fail(): void
	{
		$this->load->language('extension/payanyway/payment/payanyway');

		$this->changeStatusUnderOrderLock(false, $this->errorOrderStatusId, $this->language->get('text_payment_error'));

		$this->response->redirect($this->url->link('checkout/failure', '', true));
	}

    /**
     * Смена статуса со страницы покупателя — под блокировкой заказа, как в Pay URL: заказ
     * перечитывается, оплаченный (сейчас или по истории) не трогается. Возврат с MONETA.RU
     * приходит параллельно с уведомлением об оплате.
     *
     * @param bool $allowFailed подтверждение формы допускает повторную попытку после «Неуспешного»
     * @throws \Exception
     */
	private function changeStatusUnderOrderLock(bool $allowFailed, int $orderStatusId, string $comment): bool
	{
		if (!$this->isStatusChangeableByCustomer($allowFailed)) {
			return false;
		}

		$this->load->model('extension/payanyway/payment/payanyway');
		if (!$this->model_extension_payanyway_payment_payanyway->acquireOrderLock((int)$this->orderId, self::$orderLockTimeoutSeconds)) {
			return false;
		}

		$this->loadOrder($this->orderId);
		$changeable = $this->isStatusChangeableByCustomer($allowFailed)
			&& !$this->model_extension_payanyway_payment_payanyway->hasOrderStatusInHistory((int)$this->orderId, $this->successOrderStatusId);
		if ($changeable) {
			$this->addOrderHistory($this->orderId, $orderStatusId, $comment);
		}
		$this->model_extension_payanyway_payment_payanyway->releaseOrderLock((int)$this->orderId);

		return $changeable;
	}

	/** Заказ модуля, ещё не ушедший дальше «Обрабатываемого» (или «Неуспешного» — для повторной попытки). */
	private function isStatusChangeableByCustomer(bool $allowFailed): bool
	{
		if (([] === $this->orderInfo) || !$this->isPaidWithModule()) {
			return false;
		}

		$orderStatusId = (int)$this->orderInfo['order_status_id'];

		return $allowFailed ? $this->isAwaitingPayment($orderStatusId) : in_array($orderStatusId, [0, $this->pendingOrderStatusId], true);
	}

	private function getDescription(): string
	{
		$orderId = $this->orderInfo['order_id'] ?? null;
		$description = $this->language->get('text_description');
		if (!empty($orderId)) {
			$description .= ' ' . sprintf($this->language->get('text_description_number'), $orderId);
		}

		$name = $this->getClientName();
		if (null !== $name) {
			$description .= ' ' . sprintf($this->language->get('text_description_customer'), $name);
		}

		$comment = $this->orderInfo['comment'] ?? '';
		if ('' !== $comment) {
			$description .= ': ' . htmlspecialchars($comment, ENT_QUOTES, 'UTF-8');
		}

		return $this->validateString($description, self::DESCRIPTION_MAX_LENGTH);
	}

	private function getUrlArgs(mixed $customerToken): string
	{
		$args = 'language=' . $this->config->get('config_language');
		if (is_string($customerToken) && ('' !== $customerToken)) {
			$args .= '&customer_token=' . urlencode($customerToken);
		}

		return $args;
	}

	private function getSubscriberId(): string
	{
		return $this->getClientEmail() ?? $this->getClientPhone() ?? '';
	}
}